Angostura Aromatic Bitters
Angostura Aromatic Bitters is a bitters made by Angostura Limited of Trinidad and Tobago at 45% ABV, used in 1 drink on this site.

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A bottle of Angostura aromatic bitters, oversized white label wrapped around dark glass, yellow foil cap, against a plain background.
Composition
The producer's own product page states the bitters are 100% vegan and gluten-free.
USDA FoodData Central (Branded), cross-checked · 2570291 — FoodData Central's branded record for this exact product gives 200 kcal/100 g and 0 g carbohydrate; an independent Open Food Facts entry for the same product agrees on both figures, which is what makes them credible. Neither dataset carries an alcohol figure, because a bottled bitters sold in the US is not required to carry the Nutrition Facts panel that would state one - the 200 kcal/100 g figure is a lab analysis of the food-labelling side only. The 44.7% alc./vol. is the producer's own labelled strength, reported identically by the producer and by every retailer checked. No measured density exists for a bitters this strong with no sugar; the density-classes.json 'spirit-40' class is used as the nearest fit.